<template>
	<div class="sc-upload-file">
		<el-upload :disabled="disabled" :auto-upload="autoUpload" :action="action" :name="name" :data="data"
			:http-request="request" v-model:file-list="defaultFileList" :show-file-list="showFileList" :drag="drag"
			:accept="accept" :multiple="multiple" :limit="limit" :before-upload="before" :on-success="success"
			:on-error="error" :on-preview="handlePreview" :on-exceed="handleExceed">
			<slot>
				<el-button type="primary" :disabled="disabled">Click to upload</el-button>
			</slot>
			<template #tip>
				<div v-if="tip" class="el-upload__tip">{{ tip }}</div>
			</template>
		</el-upload>
		<span style="display: none !important"><el-input v-model="value"></el-input></span>
	</div>
</template>

<script>
import config from "@/config/upload";

export default {
	props: {
		modelValue: { type: [String, Array], default: "" },
		tip: { type: String, default: "" },
		action: { type: String, default: "" },
		apiObj: { type: Object, default: () => { } },
		name: { type: String, default: config.filename },
		data: { type: Object, default: () => { } },
		accept: { type: String, default: "" },
		maxSize: { type: Number, default: config.maxSizeFile },
		limit: { type: Number, default: 0 },
		autoUpload: { type: Boolean, default: true },
		showFileList: { type: Boolean, default: true },
		drag: { type: Boolean, default: false },
		multiple: { type: Boolean, default: true },
		disabled: { type: Boolean, default: false },
		onSuccess: {
			type: Function,
			default: () => {
				return true;
			},
		},
	},
	data() {
		return {
			value: "",
			defaultFileList: [],
		};
	},
	watch: {
		modelValue(val) {
			if (Array.isArray(val)) {
				if (
					JSON.stringify(val) !=
					JSON.stringify(this.formatArr(this.defaultFileList))
				) {
					this.defaultFileList = val;
					this.value = val;
				}
			} else {
				if (val != this.toStr(this.defaultFileList)) {
					this.defaultFileList = this.toArr(val);
					this.value = val;
				}
			}
		},
		defaultFileList: {
			handler(val) {
				this.$emit(
					"update:modelValue",
					Array.isArray(this.modelValue)
						? this.formatArr(val)
						: this.toStr(val)
				);
				this.value = this.toStr(val);
			},
			deep: true,
		},
	},
	mounted() {
		this.defaultFileList = Array.isArray(this.modelValue)
			? this.modelValue
			: this.toArr(this.modelValue);
		this.value = this.modelValue;
	},
	methods: {
		//默认值转换为数组
		toArr(str) {
			if (str == null) {
				return [];
			}
			var _arr = [];
			var arr = str.split(",");
			arr.forEach((item) => {
				if (item) {
					var urlArr = item.split("/");
					var fileName = urlArr[urlArr.length - 1];
					_arr.push({
						name: fileName,
						url: item,
					});
				}
			});
			return _arr;
		},
		//数组转换为原始值
		toStr(arr) {
			return arr.map((v) => v.url).join(",");
		},
		//格式化数组值
		formatArr(arr) {
			var _arr = [];
			arr.forEach((item) => {
				if (item) {
					_arr.push({
						name: item.name,
						url: item.url,
					});
				}
			});
			return _arr;
		},
		before(file) {
			const maxSize = file.size / 1024 / 1024 < this.maxSize;
			if (!maxSize) {
				this.$message.warning(
					`上传文件大小不能超过 ${this.maxSize}MB!`
				);
				return false;
			}
		},
		success(res, file) {
			var os = this.onSuccess(res, file);
			if (os != undefined && os == false) {
				return false;
			}
			var response = config.parseData(res);
			file.name = response.fileName;
			file.url = response.src;
		},
		error(err) {
			this.$notify.error({
				title: "上传文件未成功",
				message: err,
			});
		},
		beforeRemove(uploadFile) {
			return this.$confirm(`是否移除 ${uploadFile.name} ?`, "提示", {
				type: "warning",
			})
				.then(() => {
					return true;
				})
				.catch(() => {
					return false;
				});
		},
		handleExceed() {
			this.$message.warning(
				`当前设置最多上传 ${this.limit} 个文件，请移除后上传!`
			);
		},
		handlePreview(uploadFile) {
			window.open(uploadFile.url);
		},
		request(param) {
			var apiObj = this.apiObj;
			if (!apiObj) {
				return;
			}
			const data = new FormData();
			data.append('file', param.file);
			data.append('filesize', param.file.size);
			data.append('filetime', param.file.lastModified);
			for (const key in param.data) {
				data.append(key, param.data[key]);
			}
			apiObj
				.post(data, {
					onUploadProgress: (e) => {
						const complete = parseInt(
							((e.loaded / e.total) * 100) | 0,
							10
						);
						param.onProgress({ percent: complete });
					},
				})
				.then((res) => {
					var response = config.parseData(res);
					if (response.code == config.successCode) {
						param.onSuccess(res);
					} else {
						param.onError(response.msg || "未知错误");
					}
				})
				.catch((err) => {
					param.onError(err);
				});
		},
	},
};
</script>

<style scoped>
.el-form-item.is-error .sc-upload-file:deep(.el-upload-dragger) {
	border-color: var(--el-color-danger);
}

.sc-upload-file {
	width: 100%;
}

.sc-upload-file:deep(.el-upload-list__item) {
	transition: none !important;
}
</style>
